Transient Behaviour Of Iter Poloidal Field Coils
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| Author | : Alexander Winkler |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 182 |
| Release | : 2014-08-18 |
| Genre | : Technology & Engineering |
| ISBN | : 3866445954 |
Transient voltages occur on the terminals of superconducting coils and may lead to internal over-voltages. The main objective of this work was to calculate the transient electrical behaviour and internal voltage distribution within the ITER poloidal field (PF) coils at four scenarios and was made using the PF 3 and PF 6 coils as examples. The calculated maximum voltages will be used for definition of amplitudes and voltage waveforms for the tests of the high-voltage insulation of the coils.
| Author | : Bayer, Christoph M. |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 222 |
| Release | : 2017-02-16 |
| Genre | : Physics |
| ISBN | : 373150605X |
Nuclear fusion is a key technology to satisfy the basic demand for electric energy sustainably. The official EUROfusion schedule foresees a first industrial DEMOnstration Fusion Power Plant for 2050. In this work several high temperature superconductor sub-size cables are investigated for their applicability in large scale DEMO toroidal field coils. Main focus lies on the electromechanical stability under the influence of high Lorentz forces at peak magnetic fields of up to 12 T.
| Author | : Alexander Winkler |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2011 |
| Genre | : Electromotive force |
| ISBN | : |
| Author | : Naeckel, Oliver |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 220 |
| Release | : 2016-11-14 |
| Genre | : Physics |
| ISBN | : 3731505266 |
Electrical power grids are the lifeline of technical infrastructure and fundamental for industry and modern lives. Fault Currents can disrupt the continuous supply of electrical energy, cause instable grid conditions and damage electrical equipment. The Air Coil Superconducting Fault Current Limiter (AC-SFCL) is a measure to effectively limit fault currents. The concept is investigated and proven experimentally by designing, building and successfully testing a 60 kV, 400 V, z = 6% demonstrator.
| Author | : Zou, Shengnan |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 174 |
| Release | : 2017-12-01 |
| Genre | : Technology (General) |
| ISBN | : 3731507153 |
High temperature superconducting (HTS) bulks and stacks of coated conductors can be magnetized to become trapped-field magnets that provide much stronger magnetic fields than those reachable with conventional permanent magnets. This work investigates the flux dynamics during the magnetization of HTS trapped-field magnets and proposes possible strategies to improve the trapped field produced by the pulsed field magnetization method that is promising for practical applications.
| Author | : Axel Stockhausen |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 152 |
| Release | : 2014-07-20 |
| Genre | : Technology & Engineering |
| ISBN | : 3731500663 |
Hot-electron bolometers are fast and low noise radiation detectors which can be used for many different applications. The aim of this work was to optimize the fabrication process of hot-electron bolometers and gain a deeper understanding of the underlying processes. To achieve this, the fabrication of the superconducting thin films was optimized and the superconducting properties of the films were analyzed. Detectors fabricated using the results showed a record value for the noise temperature.
| Author | : Petra Thoma |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 192 |
| Release | : 2014-07-28 |
| Genre | : Science |
| ISBN | : 3731500701 |
For the analysis and optimization of the picosecond pulsed terahertz radiation generated by electron storage rings or other pulsed sources, ultra-fast detectors are required which are able to resolve picosecond dynamic processes directly in the time domain. In this book, a new direct terahertz detector technology based on the high-temperature superconductor YBa2Cu3O7-x has been developed which opens new routes in the analysis of picosecond time-domain processes with a wide dynamic range.
| Author | : Rösch, Markus |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 220 |
| Release | : 2014-01-21 |
| Genre | : Science |
| ISBN | : 3731501104 |
This thesis studies the development of LEKID arrays for the use in a mm-wave camera for the IRAM 30m telescope. This includes the design and fabrication of the superconducting microresonators, the modeling and optimization of the mm-wave coupling to the detector and the characterization of the arrays at low temperatures. The results obtained brought IRAM to test a prototype instrument at the telescope, where first astronomical results have been achieved, which are also presented in this work.
| Author | : Hofherr, Matthias |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 216 |
| Release | : 2014-09-26 |
| Genre | : Technology & Engineering |
| ISBN | : 3731502291 |
Superconducting nanowire singe-photon detectors (SNSPD) are promising detectors in the field of applications, where single-photon resolution is required like in quantum optics, spectroscopy or astronomy. These cryogenic detectors gain from a broad spectrum in the optical and infrared range and deliver low dark count rates and low jitter times. This thesis improves the understanding of the detection mechanism of SNSPDs and intodruces new and promising multi-pixel readout concepts.
| Author | : Henrich, Dagmar |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 204 |
| Release | : 2014-07-28 |
| Genre | : Science |
| ISBN | : 3731500922 |
Superconducting Nanowire Single-Photon Detectors offer the capability to detect electromagnetic waves on a single photon level in a wavelength range that far exceeds that of alternative detector types. However, above a certain threshold wavelength, the efficiency of those detectors decreases stronlgy, leading to a poor performance in the far-infrared range. Influences on this threshold are studied and approaches for improvement are verified experimentally by measurement of the device performance.
